code: def fit(self, X, y=None, **fit_params):
      return self
  
file_path: mlcourse.ai/jupyter_russian/topic06_features/demo.py
imports: import numpy
  import pandas
  import json
  from sklearn.base import TransformerMixin
label_desc: Use image node_id 2 for calling the FeatureEngineer obj's underlying member method code with example usage: obj.fit(X, y) and returns: self